NYC-WTC_000191684

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8011 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 11 Grid Opening Size: 0,01124

Client Sample #: 11 Area Examined: 0.04496 mm"

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/S/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure type Length ' ID of Structure N or y' EDS No (Nonadb F B C M >=05 M : ’=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5|j Elements)

u IS

Struct = > O-Sp > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j >/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ] amphiboles ; Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) I Anthophyllite Non-Asbestos J Tremolite M = Matrix Non-Identified ; Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO3O91562 NYC-WTC_000191684